Q157 / 160 · AP EAMCET 2022 (05 Jul Shift 2) · Physics

The ratio of radii of $3^{\text {rd }}$ and $6^{\text {th }}$ Bohr's orbit in a hydrogen atom is

  • Correct answer
    A
    $0.25$
  • B
    $0.33$
  • C
    $4$
  • D
    $3$

Solution

We have, $\frac{\mathrm{r}_3}{\mathrm{r}_6}=\frac{3^2}{6^2}=\frac{9}{36}=0.25 \quad\left[\because \mathrm{r}_{\mathrm{n}} \propto \mathrm{n}^2\right]$

Hence, the correct answer is option: 'A'.

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